i·so·fla·vone 
(ī′sō-flāvōn′)
(ī′sō-flāvōn′)n.
1. A crystalline compound, C15H10O2, that is an isomer of flavone.
2. Any of various derivatives of this compound that are found as glycosides in many plants, especially soybeans, and that often have weak estrogenic activity.
- second-rater
- second sight
- second-story man
- second-strike
- second string
- second-string
- second-stringer
- second thought
- second wind
- Second World
- Second-World
- Second World War
- secrecy
- secret
- secreta
- secretagogue
- secretarial
- secretariat
- secretary
- secretary bird
- secretary-general
- secretary of state
- secretase
- secret ballot
- secrete